9993986 has 8 divisors (see below), whose sum is σ = 15310080. Its totient is φ = 4890628.

The previous prime is 9993967. The next prime is 9993989. The reversal of 9993986 is 6893999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9993989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53066 + ... + 53253.

It is an arithmetic number, because the mean of its divisors is an integer number (1913760).

Almost surely, 2^9993986 is an apocalyptic number.

9993986 is a deficient number, since it is larger than the sum of its proper divisors (5316094).

9993986 is a wasteful number, since it uses less digits than its factorization.

9993986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106368.

The product of its digits is 944784, while the sum is 53.

The square root of 9993986 is about 3161.3266202656. The cubic root of 9993986 is about 215.4002711082.

The spelling of 9993986 in words is "nine million, nine hundred ninety-three thousand, nine hundred eighty-six".